Motor-driven utensil



L. COLLINS.

MOTOR DRIVEN UTENSIL. y

APPLICATION man 1AN.14. 1921.

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UNITED STATES PATENT OFFICE.

LATHROP COLLINS, 0F EVANSTON, ILLINOIS.

Moron-DRIVEN UTENSIT..

To all whom it may concern.'

Be it known that I, LATHRoP COLLINS, a citizen of the United States, residin at Evanston, in the county of Cook andv tate of Illinois, have invented certain new and useful Improvements in Motor-Driven Utensils, -ofwhich the following is a specification.

My invention relates to hand-held utensils having rotatable operating parts, such, more specifically, as egg beaters, and has for its general object to provide a construction wherein the moving parts may be motor driven. Among the objects of my invention are the correlation of the driven elements, handle, and motor for quick detachability of the latter, but with normal rigorous maintenance of the operative relation between the parts; organization for effective balance and ease of handling; simplicity and ease of construction; facility in assembling and dismantling the parts in the initial construction and for cleaning or replacement; "eilicient and advantageous construction of the driving gearing and driven elements, and effective mounting of the gearing and driven elements. Further objects will become apparent to'those skilled in the art from the following description taken in conjunction with the accompanying drawings showing one embodiment of my invention for purposes of disclosure.

In the drawings Figure lis a side elevation of a motor-equipped egg beater; Fior. 2 is a horizontal section on line 2--2 of ig. 1; Fig. 3 is a vertical section on line 3--3 of Fig. 2; Fig. 4 is a vertical section on line sfo 4-4` of Fig. 2; Fig. 5 is an enlarged detail of a split connection between the motor frame and handle; and Fig. 6 is a vertical section on line 6-6 of Fig. 5.

The device illustrated comprises generally a handle structure 10 to be carried and positioned by thev operator, gear casing) 11 .se-

e cda-off? A the frame; electric motor 12 positionedfde-.jf

cured to the handle and forming th mountably in the. frame .,to ycoactfwith 4the casing-contained 14, to be driven.

lThe frame body, or gear casingfflll, horizontally dis osed casting providigsidef walls 15 prefera ly of oval form, with` a horizontal partition or septum separating the upper and lower'- chambers 17 and 18.

gearing and the "parts,-

Specification of Letters Patent. Patented Mal'. 22, 1921.

Appncanun med January 14, 1921.

Serial No. 437,164.

frame 23 is provided as a wire loop 24, suitably bowed for clearance of the beater bla-des, its lower end carrying the short upturned studs 25 that enter the tubular rivets 22 and afford the requisite bearing for rotation, while the upper ends of the wire, ex-

tending in parallel relation yinto the gearcasing as shown in Fig. 4, have. their extremities threaded, passed through holes in the partition 16, and provided with nuts 26 above and` below the partition, these nuts being located in a propriate recesses made in the partition. y unscrewing the upper .nuts the beater-frame may' readily bedetached, and by suitable adjustment of the upper and lower nuts bearing studs 25 may be brought into accurate alinement with the shafts 19 and 20.

Below the septum the two shafts are connected by the meshed duplicate gears 27, each held against rotation on its shaft preferably by a pin 28 engaging a suitable transverse recess in its gear, A lower cover plate 29 for the chamber 18 is made in duplicate4 sections meeting .on the longitudinal axis of the casing, Aand provided with suitable apertures for the'wire frame 24 and halfapertures'for -the beater'members, the cover plate being retained by screws engaging the walls 15.

Within4 the upper chamber 17 shaft 20 has secured thereon a large gear 3,1, posi- 'tioned as by the pin 32 and nut meshing with a driving pinion 34 that' is "rojtatively loose on there'duced extremity of shaft- 19. A coverplate 35 is screwed on to cover the chamber 15T-fand is provided with a single o enin'gllthrough which projects the ellitch col ar 36 fixed'to the gear 34 as a extension', this collar having a flange x36 to underlie vthe margin of theV cover opening. The top of the axially open collar is transversely notched as at 37 and cam arched.

tom to interit with and wedge in the correspondingly tape-red lower portion of the keyhole slot 42 that is made in the vertically disposed receptive port-ion of handle 10, this portion of the4 handle. of course. being of a thickness just to slide under the head of the lug. The handle structure. as shown. preferably comprises a base portion 43 einbracing a large port-ion of the perimeter of the gear casing l1 and secured thereto by screws 44 that enter the part-ition-strengthened portion of sa-id casing, a front leg 45 that is bent forwardly and then rises vertically for a distance including the key-hole slot 42. a rear brace 46 meeting the first described handle portion at the point where the latter bends forwardly, and a suitable grip 48 wnnecting the front leg and rear brace above the level of the motor. The metallic portions o f the handle are preferably struck from sheet-metal, suitably ribbed for strength, and it will be observed that with the construction described. and as shown. the utensil is balanced with respect to the handle so that its beaters may be held in generally vertical position withoutv any strain on the operator.

In operation the motor speed is reduced by the gearing 34, 33, independently of any speed control afforded by the motor and the construction insures smooth running operation. The motor may be detached by siniply drawin it upward. bringing the head of its attac ing lug 40 opposite the upper enlargement of the key-hole slot 42. and when the motor is replaced the cam curvature 38 directs its pin 39 into the collar slot. while the taper of the lug 40 and handle slot accurately 'bring the motor into intended position and hold it firmly against unintentional loosening.

While I have herein described in considerable detail a specific embodiment of my invention it will be understood by those skilled in the art that changes may be made in the details of construction Without departure from the spirit of my invention Within the scope of the appended claims.

I claim:

1. The combination of a horizontal gear casing. a. handle secured thereto having an upright member, a motor positioned upright by said member. a pair of upright shafts in the gear-casing, beater-members secured to said shaft and extending below the gear casing, and` withinqthe casing, a reduction-gearing operatively connected with the motor and with one said shaft and gearing connecting the two shafts.

2. The combination of a horizont-al gear casing, a handle secured thereto having an 'ipright member. a motor positioned upright by said nieiiibei, a pair of upright shafts in the gear-casing. beater-inembers secured to said shafts and extending below the gear casing, said casing divided by a aorizontal partition in which said shafts bear and containing, above the partition a reduction-gearing operatively connected with the motor and below the partition gearing connecting said two shafts.

f5. rl`he combination of a horizontal gear easing, a handle secured thereto having an upright member. a motor quiek-detachably connected to and positioned upright b v said member. a pair of upright shafts in the gear-casing, beater-ineinbers secured to said shafts and extending below the gear casing` and. within the casing. a reduction-gearing operatively and quiek-detachably connected with the motor and with one said shaft and gearing connecting the two shafts.

l.. The combination of a horizontal gear- \as1ng. a handle secured thereto having an 95 inright member attached to the rear portion of the casing and also having a grip, in electric motor vertically disposed in front if said handle. the motor and upright handle-member having mutual provision for mick engagement and detachment, reduction-gearing in said casing having a sha ft to ie driven. it and the, inotor-sliaft having :nutual provision for quick connection and detachment. and an agitator element operatively connected with the gearing.

The combination of a. horizontal gearasing. a handle secured thereto having an upright member attached to the rear portion of the casing and also having a grip, an electric motor vertically disposed in front of said handle. the motor having a headed stud and the upright handle-member having a cooperative keyhole-slot for quick engagement and detachment, reduction-gearing in said casing havin a shaft to be iriven. it and the motor-s aft having mutualprovision for quick connection and detachment` and an agitator element operatively connected with the aring.

P. The combination of a orizontal gearcasing, a handle secured thereto having an upright member attached to the rear por- :ion of the casing and also having a grip, in electric motor vertically disposed in front of said handle. the motor having a headed stud and upright handle-member having a cooperative keyhole slot, the slot and stud having tapered. Wedging side walls arranged for quick engagement and detachment,vreductiongearing in said casing having a shaft to be driven, it and the motorshaft having mutual provision for quick connection and detachment, and an agitator element operatively connected with the gearing.

7. A motor-driven egg-beater comprising in combination, a pair of Dover beaterstructures, a frame therefor comprising a wire bow exterior to and between the axes of the bea-ters said bowl having parallel upper ends and at its bottom having short lateral studs on which the beater-structures pivot, a horizontal gear casing having a wall to receive the upper ends of the bow, means to independently adjust the upper ends of the bow with respect to said wall, gearing in said casing connecting the beater structures, a handle secured .to said casing, and an electric motor above said casing coperatively connected to drive said gearing.

8. In a motor-driven egg-beater, a gear casing, a beater structure depending below the casing, gearing in the casing operatively connected with said beater structure, a handle rising from the gear casing, and an electric motor wholly supported by said handle and quick'- detachably connected therewith, the shaft of said motor having operative quick-detachable connection with the beater-driving gearing.

9. The combination of a handle structure having an upwardly extending member, a gear casing carried lon the lower portion of said upwardly-extending member, a motor positioned by said upwardly-extending member and having an upright shaft, a member to be driven extending below the gear-casing, and gearing in said casing operativelyconnected with said member-to-bedriven and with the motor shaft. i

l0. The combination of a handle structure having an upwardly extending member, a gear casing carried on the `lower portion'of said upwardly-extending member a motor quick-detachably connected with and positioned by said upwardl -extending member and having an upright s aft, a member to be driven extending below the gear-casing, and

. gearing in said casing operatively connected with said member-to-be-driven and having qlliiffzk detachable connection with the motor s a t.

11. The combination of a handle structure having an upwardly extending member, a gear casing carried on the lower portion of said upwardly-extending member, a motor having an upright shaft, said motor and handle-member having coacting stud and vertical-slot provision for quick detachment of the motor, a member to be rotated extending below the gear casing, and speed changing gearing in vsaid casingoperatively connected with said member-to-be-rotated, and having vertically-separable rotative connection with the motor-shaft.

l2. The combination of a'horizontal gear casing; a handle secured thereto having an upright member a pair of upright yshafts in the gear casing; members to be rotated secured to said shafts and extending below the gear casing; gearing interconnecting said shafts and speed-change gearing operatively connected with one shaft, located within the casing; and a motor positioned upright by said handle-member and operaatively connected with said speed-change gearin 13. n a hand-portable, motor driven agitator, a casing having a handle rising therefrom, an agitator element sustained by said casing and projecting therefrom, and an elect-rlc motor, supported from said handle and having quick-detachable connection therewith, the shaft of said motor having quickdetachable operative connection to drive said agitator element.

14. In a hand-portable, motor driven agitator, a casing havin a handle rising from its rear portion and aving a ofrip, an agitator element sustained by sait casing and depending therefrom, and an electric motor in front of and supported from said handle and having quick-detachable connection therewith, the shaft of said motor having quick-detachable operative connection to drive said agitator element.

LA'IHROP COLLINS. 

